JP2004291468A - Decorative sheet - Google Patents

Decorative sheet Download PDF

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Publication number
JP2004291468A
JP2004291468A JP2003088344A JP2003088344A JP2004291468A JP 2004291468 A JP2004291468 A JP 2004291468A JP 2003088344 A JP2003088344 A JP 2003088344A JP 2003088344 A JP2003088344 A JP 2003088344A JP 2004291468 A JP2004291468 A JP 2004291468A
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Prior art keywords
adsorbent
formaldehyde
voc
coating film
silica gel
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JP2003088344A
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Japanese (ja)
Inventor
Nobuo Kawabe
伸夫 川邊
Yasuhiro Takeda
康浩 竹田
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Daiken Trade and Industry Co Ltd
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Daiken Trade and Industry Co Ltd
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Priority to JP2003088344A priority Critical patent/JP2004291468A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00267Materials permeable to vapours or gases
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/2038Resistance against physical degradation
    • C04B2111/2061Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/27Water resistance, i.e. waterproof or water-repellent materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Finishing Walls (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet constituted so as to stably adsorb formaldehyde, VOC and a malodor over a long period of time. <P>SOLUTION: This decorative sheet is constituted by forming a coating film 2 having air permeability on the surface of a mineral fiberboard 1 comprising mineral fibers, an inorganic filler, a binder and a B-type silica gel. This coating film 2 is composed of a vehicle, a pigment, a hydrophobic adsorbent for adsorbing at least one of formaldehyde, VOC and the malodor and a photocatalyst for decomposing the adsorbed substance of the adsorbent. By this constitution, humidity under a high humidity condition is selectively adsorbed by the hydrophilic B-type silica gel contained in the mineral fiberboard 1 being a base material through the air permeable coating film 2 and the adsorbent for formaldehyde, VOC and the malodor is hydrophobic, low in the adsorption quantity of humidity and develops an adsorbing function sufficiently. The adsorbed substance of the adsorbent is decomposed by the photocatalyst contained in the coating film 2 to keep the adsorbing function of the adsorbent stably over a long period of time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、内装材として用いられる化粧板に関し、特にホルムアルデヒド、VOC、悪臭を吸着するものに関する技術分野に属する。
【0002】
【従来の技術】
従来より、この種の化粧板として、例えば特許文献1に示されているように、ホルムアルデヒドを物理吸着する多孔質材料を含有した基材に、ホルムアルデヒドを化学吸着する化合物を含有する塗料を塗布したものが知られている。具体的には、ベントナイト、澱粉を含有する鉱物質繊維板に、化学吸着化合物のアセチルアセトアミノアミンを含有する塗料が塗布されている。
【0003】
また、この他、特許文献2に示されるように、繊維板からなる通気性基材の表面を、活性炭を含有しガス透過性の隠蔽性塗材塗布層で覆った内装用建築板が知られている。このものでは、鉱物質繊維板の表面に活性炭、タンカル、酢酸ビニルからなる下塗り塗料を塗布し、その上に酸化チタン、酢酸ビニル樹脂からなる隠蔽性塗料を塗布している。
【0004】
【特許文献1】
特開2000―356022号公報
【特許文献2】
特開2002―264247号公報
【0005】
【発明が解決しようとする課題】
しかし、上記従来の特許文献1のものでは、ホルムアルデヒドを化学吸着している化学吸着剤の吸着容量(反応容量)に限度がある。このため、高濃度のホルムアルデヒドが発生する部屋で用いられて、化学吸着剤の吸着容量を超えると、効果が低くなるという問題が生じ、改良の余地があった。
【0006】
また、特許文献2に示されるものでは、活性炭は吸放湿材でもあり、VOCよりも湿気を選択的に吸着するため、高湿度条件では吸湿してしまい、その分、VOCの吸着能力が低下することとなり、このものでも改良の余地がある。
【0007】
本発明は斯かる諸点に鑑みてなされたもので、その目的は、上記した化粧板の構成に所定の改良を加えることで、ホルムアルデヒド、VOC及び悪臭を高い吸着性能でもって長期間に亘り安定して吸着できる化粧板を得るようにすることにある。
【0008】
【課題を解決するための手段】
上記の目的を達成すべく、この発明では、化粧板の基材に親水性の吸放湿材を含有させ、その表面に疎水性の吸着剤と、吸着物質を分解する光触媒とを含む通気性を有する塗料を塗布するようにした。
【0009】
具体的には、請求項1の発明の化粧板では、鉱物質繊維、無機充填材、結合剤、及び親水性の吸放湿材からなる基材としての鉱物質繊維板の表面に、ビヒクルと、顔料と、ホルムアルデヒド、VOC及び悪臭の少なくとも1つを吸着する疎水性の吸着剤と、この吸着剤で吸着された物質を分解する光触媒とからなりかつ通気性を有する塗料が塗布された塗膜が形成されていることを特徴とする。
【0010】
上記の構成によると、化粧板の基材としての鉱物質繊維板に親水性の吸放湿材が含まれているので、この親水性の吸放湿材が高湿条件下での湿気を通気性の塗膜を通して選択的に吸着する。一方、ホルムアルデヒド、VOC及び悪臭(アンモニア、硫化水素、メチルメルカプタン、トリメチルアミンを4大悪臭という)の吸着剤は疎水性であるため、その吸着剤による湿気の吸着量は少なく、これらの吸着剤はそれぞれの機能を十分に発現することができる。
【0011】
そして、上記塗膜には、上記ホルムアルデヒド、VOC及び悪臭の吸着剤ばかりでなく、この吸着剤で吸着された物質を分解する光触媒も含有されているので、吸着剤で吸着された物質は光触媒により分解されるようになり、吸着剤の吸着容量に関係なく、長期に亘って吸着機能を持続させることができる。
【0012】
請求項2の発明では、上記吸放湿材はB型シリカゲルとする。このB型シリカゲルは、常態では放湿しないA型シリカゲルと異なり、常態において吸放湿するので、上記吸放湿材として特に好ましい。
【0013】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて詳細に説明する。以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものでは全くない。
【0014】
図1は本発明の実施形態に係る化粧板Aを示し、この化粧板Aは室内の天井材や壁材等として用いられる。1は基材としての鉱物質繊維板であって、この鉱物質繊維板1の表面に塗料が塗布されて塗膜2が形成されている。
【0015】
上記鉱物質繊維板1は、ロックウール等の鉱物質繊維と、パーライトやベントナイト等の無機充填材と、澱粉や故紙パルプ等の結合剤(バインダ)と、親水性の吸放湿材としてのB型シリカゲルとからなる。例えば、これらの材料をスラリーとして成板した後、脱水、成型及び乾燥することで得られる。
【0016】
上記吸放湿材としてのB型シリカゲルは、A型シリカゲルと異なり、常態において吸放湿するので、上記吸放湿材として特に好ましい。A型シリカゲルは低湿度においても吸湿性に優れているが、常態では放湿しない。
【0017】
すなわち、シリカゲルはJISでA型とB型とに大別され、両者は構造による違いである。A型シリカゲルは一般的な乾燥剤として用いられているもので、微細な構造となっていて表面積が大きく、水分子と化学吸着によって結合する。一方、B型シリカゲルはあまり微細ではないために、表面積も小さく、化学吸着よりも構造間での毛細管現象による物理吸着により水分子と結合する。従って、図2に示すように、A型シリカゲルでは、一度吸着した水分子は強制的に加熱しないと脱着しないが、B型シリカゲルでは、低湿度条件にすると除放していくので、呼吸作用があるといわれており、本実施形態では、このB型シリカゲルが用いられる。尚、B型シリカゲル以外の親水性の吸放湿材を用いることもできる。
【0018】
上記塗膜2は、ビヒクルと、顔料と、ホルムアルデヒド、VOC及び悪臭の少なくとも1つを吸着する疎水性の吸着剤と、この吸着剤で吸着された物質を分解する光触媒とからなるもので、通気性を有する。
【0019】
上記吸着剤は、上記ホルムアルデヒド、VOC及び悪臭(アンモニア、硫化水素、メチルメルカプタン、トリメチルアミン等)の物質をそれぞれ個別に吸着する複数の吸着剤を添加する場合と、単独で上記複数の物質を吸着する吸着剤を添加する場合とのいずれでもよい(基本的に吸着剤であれば物質の違いによって吸着のし易さの違いはあるがどのような物質も吸着する)。
【0020】
したがって、この実施形態に係る化粧板Aにおいては、その基材としての鉱物質繊維板1に親水性の吸放湿材が含まれているので、この吸放湿材が高湿条件下での湿気を通気性の塗膜2を通して選択的に吸着する。
【0021】
これに対し、ホルムアルデヒド、VOC及び悪臭の吸着剤は疎水性であるので、その吸着剤による湿気の吸着量は少なく、これらの吸着剤の各々の機能が十分に発現される。
【0022】
そして、上記塗膜2には、上記ホルムアルデヒド、VOC及び悪臭の吸着剤のみならず、この吸着剤で吸着された物質を分解する光触媒も含有されているので、吸着剤で吸着された物質は光触媒により随時分解されるようになり、吸着剤の吸着容量に関係なく、長期に亘って吸着機能を持続させることができる。
【0023】
【実施例】
次に、具体的に実施した実施例について説明する。
【0024】
(実施例1)
鉱物質繊維板からなる基材は、主成分としてのロックウールと、無機充填材としてのパーライト及びベントナイトと、バインダとしての澱粉及び故紙パルプと、吸放湿材料としてのB型シリカゲルとを材料とした。これらの材料を水に均一に分散混練してスラリーとし、通常の鉱物質繊維板の製造方法である湿式抄造にて成板し、減圧脱水、プレス成形し、さらに乾燥したものを基材とした。
【0025】
次いで、上記基材の表面を下塗り塗料及び上塗り塗料により塗装した。上記下塗り塗料は、体質顔料として炭酸カルシウムを30wt%と、白色顔料として酸化チタンを15wt%と、艶消し顔料としてシリカを9wt%と、バインダとして酢酸ビニル樹脂を16wt%と、助剤として分散剤、防カビ剤、消泡剤及び増粘剤を計1wt%と、ホルムアルデヒド吸着剤としてアミン類のアセチルアセトアミノアミン(R−CONHNH)を2.5wt%とに、残部の水を加えて撹拌したものである。
【0026】
一方、上塗り塗料は、バインダとしてアクリル樹脂を30wt%と、顔料として酸化チタンを3wt%と、その他の助剤として分散剤、防カビ剤、消泡剤、増粘剤、艶消し剤及びブロッキング防止剤を計1wt%と、VOC吸着剤として活性炭を2wt%と、消臭剤として無機酸化物系の化学吸着剤(亜鉛を含むゼオライト)を2wt%と、光触媒として酸化チタン系の触媒を3wt%とに、残部の水を加えてエマルジョン化したものである。
【0027】
そして、上記下塗り塗料を上記基材表面に150〜250g/mの割合で塗布して乾燥させた後、その上に上塗り塗料を50〜150g/mの割合で塗布して乾燥したものを試験片(サンプル)とした。
【0028】
(比較例1)
比較例1は、上記実施例において、ホルムアルデヒド吸着剤、VOC吸着剤、消臭剤及び光触媒を含有しない塗料を使用したものであり、その他の構成は実施例と同じである。
【0029】
(比較例2)
比較例2は、基材としてB型シリカゲルを含まない通常の鉱物質繊維板を用い、塗装については、実施例と同様に、ホルムアルデヒド吸着剤、VOC吸着剤、消臭剤及び光触媒を含有する塗料を使用した。
【0030】
以上の実施例、比較例1及び比較例2についての組成を下記の表1に示す。
【0031】
【表1】

Figure 2004291468
【0032】
上記実施例、比較例1及び比較例2に対し、▲1▼吸放湿性能、▲2▼VOC吸着性能、▲3▼ホルムアルデヒド吸着性能、及び▲4▼アンモニア吸着性能(消臭性能)を試験により評価した。
【0033】
▲1▼ 吸放湿性能
試験片の木口及び裏面をアルミテープにてマスキングし、25℃、50%RH条件下で24時間以上養生した。この養生後、雰囲気を25℃、90%RHに変更し、試験片の吸湿量を重量変化により測定した。24時間の経過後、再び25℃、50%RHに戻し、放湿量を測定した。その結果を図3に示す。この図3によれば、実施例及び比較例1は比較例2の4倍以上の吸放湿量が得られており、吸放湿性に優れることが判る。
【0034】
また、実際の室内の温度及び湿度の変化に応じた調湿性能を図4に示す。この図4によると、温度及び湿度の変化に伴い、吸放湿性の低い比較例2はカビ発生危険ゾーンや乾燥ゾーンに移行することがあるが、実施例及び比較例1は快適ゾーンに維持される。
【0035】
▲2▼ VOC吸着性能
20cm角の試験片の木ロ及び裏面をアルミテープにてマスキングして100Lステンレスチャンバに設置した。このチャンバに清浄な空気を流しながらトルエンガスを注入して初期濃度を1000μg/mとする。ガス注入から経時時間毎にチャンバ内空気をサンプリングし、加熱脱着GC−MS法で分析してトルエン濃度を測定した。このような測定を常態(55%RH)、低湿度時(20%RH)及び高湿度時(85%RH)に雰囲気を変えて測定した。その結果を図5に示す。図5(a)は常態を、また図5(b)は低湿度時を、さらに図5(c)は高湿度時をそれぞれ示している。
【0036】
この結果をみると、実施例では、塗膜の吸着剤による吸着と基材のB型シリカゲルによる吸着とが行われ、比較例1では基材のB型シリカゲルによる吸着が、また比較例2では塗膜の吸着剤による吸着がそれぞれ行われている。
【0037】
常態及び低湿度時では、実施例が最も優れているが、比較例1及び2と比べて大きな差はない。一方、高湿度時では、実施例は基材のB型シリカゲルにより湿気を吸着するので、塗膜の吸着剤によりVOCを吸着するが、比較例1は吸着剤がないために十分な吸着量が得られていない。また、比較例2は吸着剤が湿気そのものを吸着するためにVOCに対して十分な吸着量が得られていないことが判る。
【0038】
▲3▼ ホルムアルデヒド吸着性能
10cm角の試験片の木口及び裏面をアルミテープにてマスキングして、40Lアクリルデシケータに設置し、このデシケータにホルムアルデヒドガスを0.50ppmになるよう注入した。ガス注入から経時時間毎にデシケータ内の空気をサンプリングし、AHMT比色法によりホルムアルデヒド濃度を測定した。このような測定を常態(55%RH)で行い、その測定結果を図6に示す。
【0039】
この図6によれば、ホルムアルデヒドの吸着性能は、比較例2が比較例1よりも大きく、この比較例2よりも実施例の方が大きい(実施例>比較例2>比較例1)。実施例では、塗膜の吸着剤による吸着に加えて、基材のシリカゲルによる吸着の効果が見られる。
【0040】
▲4▼ アンモニア吸着性能(消臭性能)
10cm角の試験片の木口及び裏面をアルミテープにてマスキングして、40Lアクリルデシケータに設置し、このデシケータにアンモニアガスを15ppmになるよう注入した。ガス注入から経時時間とにデシケータ内の空気を検知管にてサンプリングし、アンモニア濃度を測定した。この測定を常態(55%RH)で行い、その結果を図7に示す。
【0041】
このアンモニアの吸着性能は、上記ホルムアルデヒド吸着性能と同様に、実施例>比較例2>比較例1の順であった。この場合も、実施例では、塗膜の吸着剤による吸着と基材のシリカゲルによる吸着との効果が見られる。
【0042】
以上の結果から、本発明の化粧板によれば、ホルムアルデヒド、VOC及び悪臭を長期間に亘り安定して吸着できることが判る。
【0043】
【発明の効果】
以上説明したように、請求項1の発明の化粧板によると、鉱物質繊維、無機充填材、結合剤、及び親水性の吸放湿材からなる鉱物質繊維板の表面に、ビヒクルと、顔料と、ホルムアルデヒド、VOC及び悪臭の少なくとも1つを吸着する疎水性の吸着剤と、この吸着剤の吸着物質を分解する光触媒とからなる通気性を有する塗膜を形成したことにより、化粧板の基材としての鉱物質繊維板に含まれている親水性の吸放湿材により、高湿条件下での湿気を通気性の塗膜を通して選択的に吸着させ、ホルムアルデヒド、VOC及び悪臭の吸着剤は疎水性で湿気の吸着量が少なくて吸着機能を十分に発現させることができ、さらには、塗膜に含有されている光触媒により吸着剤の吸着物質を分解させて、吸着剤の吸着容量に関係なく、長期間に亘って吸着機能を安定して持続することができる。
【0044】
請求項2の発明によると、吸放湿材を常態において吸放湿するB型シリカゲルとしたことにより、好ましい吸放湿材が容易に得られる。
【図面の簡単な説明】
【図1】本発明の実施形態に係る化粧板の断面図である。
【図2】B型シリカゲルの吸湿性能をA型シリカゲルと比較して示す特性図である。
【図3】吸放湿試験による吸放湿性能を示す図である。
【図4】吸放湿試験による室内調湿性能を示す図である。
【図5】トルエン吸着性能を示す図である。
【図6】常態でのホルムアルデヒド吸着性能を示す図である。
【図7】常態でのアンモニア吸着性能を示す図である。
【符号の説明】
A 化粧板
1 鉱物質繊維板
2 塗膜[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a decorative panel used as an interior material, and particularly to a technical field related to a panel that adsorbs formaldehyde, VOC, and offensive odor.
[0002]
[Prior art]
Conventionally, as a decorative plate of this type, for example, as shown in Patent Document 1, a paint containing a compound that chemically adsorbs formaldehyde is applied to a substrate that contains a porous material that physically adsorbs formaldehyde. Things are known. Specifically, a mineral fiberboard containing bentonite and starch is coated with a coating material containing a chemisorbed compound, acetylacetaminoamine.
[0003]
In addition, as shown in Patent Document 2, there is known an interior building board in which the surface of a gas-permeable base material made of a fiberboard is covered with a gas-permeable concealing coating material application layer containing activated carbon. ing. In this method, an undercoat made of activated carbon, tantalum, and vinyl acetate is applied to the surface of a mineral fiber board, and a concealing paint made of titanium oxide and a vinyl acetate resin is applied thereon.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-356022 [Patent Document 2]
Japanese Patent Application Laid-Open No. 2002-264247
[Problems to be solved by the invention]
However, in the above-mentioned conventional patent document 1, the adsorption capacity (reaction capacity) of the chemical adsorbent which chemically adsorbs formaldehyde is limited. Therefore, when used in a room where a high concentration of formaldehyde is generated and exceeds the adsorption capacity of the chemical adsorbent, there is a problem that the effect is reduced, and there is room for improvement.
[0006]
Further, in the technique disclosed in Patent Document 2, activated carbon is also a moisture absorbing / releasing material, and selectively absorbs moisture rather than VOC. Therefore, the activated carbon absorbs moisture under high humidity conditions, and the VOC adsorption capacity is reduced accordingly. And there is still room for improvement.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to stabilize formaldehyde, VOC and malodor for a long time with high adsorption performance by adding a predetermined improvement to the configuration of the decorative board described above. In order to obtain a decorative plate which can be adsorbed.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the base material of the decorative board contains a hydrophilic moisture absorbing and releasing material, and the surface thereof contains a hydrophobic adsorbent and a photocatalyst that decomposes the adsorbed substance. Was applied.
[0009]
Specifically, in the decorative board according to the first aspect of the present invention, the vehicle is provided on the surface of the mineral fiber board as a base material composed of mineral fibers, an inorganic filler, a binder, and a hydrophilic moisture absorbing and releasing material. , A pigment, a hydrophobic adsorbent for adsorbing at least one of formaldehyde, VOC and malodor, and a photocatalyst for decomposing the substance adsorbed by the adsorbent, and a coated film coated with a gas-permeable paint Is formed.
[0010]
According to the above configuration, since the mineral fiber board as the base material of the decorative board contains the hydrophilic moisture absorbing / releasing material, the hydrophilic moisture absorbing / releasing material allows ventilation under high humidity conditions. Selectively adsorbs through neutral coatings. On the other hand, since the adsorbents of formaldehyde, VOC and malodor (ammonia, hydrogen sulfide, methyl mercaptan, and trimethylamine are called four large malodors) are hydrophobic, the amount of moisture adsorbed by the adsorbent is small. Function can be sufficiently exhibited.
[0011]
The coating film contains not only the formaldehyde, VOC and odor adsorbents, but also a photocatalyst that decomposes substances adsorbed by the adsorbents. As a result, the adsorption function can be maintained for a long time regardless of the adsorption capacity of the adsorbent.
[0012]
In the invention of claim 2, the moisture absorbing and releasing material is B-type silica gel. This B-type silica gel absorbs and releases moisture under normal conditions unlike A-type silica gel, which does not release moisture under normal conditions.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its applications, or its uses.
[0014]
FIG. 1 shows a decorative panel A according to an embodiment of the present invention, and the decorative panel A is used as a ceiling material or wall material in a room. Reference numeral 1 denotes a mineral fiber board as a base material, and a paint is applied to the surface of the mineral fiber board 1 to form a coating film 2.
[0015]
The mineral fiber board 1 includes mineral fibers such as rock wool, inorganic fillers such as pearlite and bentonite, a binder (binder) such as starch and waste paper pulp, and B as a hydrophilic moisture absorbing and releasing material. And silica gel. For example, it is obtained by forming these materials as a slurry, dehydrating, molding and drying.
[0016]
Unlike the A-type silica gel, the B-type silica gel as the above-mentioned moisture absorbing and releasing material absorbs and releases moisture in a normal state, and is therefore particularly preferable as the above-mentioned moisture absorbing and releasing material. A-type silica gel is excellent in hygroscopicity even at low humidity, but does not release moisture under normal conditions.
[0017]
That is, silica gel is roughly classified into A type and B type according to JIS, and both are different depending on the structure. A-type silica gel is used as a general drying agent, has a fine structure and a large surface area, and is bonded to water molecules by chemical adsorption. On the other hand, since B-type silica gel is not very fine, it has a small surface area and binds to water molecules by physical adsorption by capillary action between structures rather than chemical adsorption. Therefore, as shown in FIG. 2, the water molecules once adsorbed by the A-type silica gel do not desorb unless forcedly heated, whereas the B-type silica gel releases under low-humidity conditions, and thus has a respiratory action. In this embodiment, the B-type silica gel is used. Incidentally, a hydrophilic moisture absorbing / releasing material other than the B-type silica gel can also be used.
[0018]
The coating film 2 comprises a vehicle, a pigment, a hydrophobic adsorbent for adsorbing at least one of formaldehyde, VOC and malodor, and a photocatalyst for decomposing the substance adsorbed by the adsorbent. Has the property.
[0019]
The adsorbent may include a plurality of adsorbents that individually adsorb the formaldehyde, VOC, and malodorous substances (ammonia, hydrogen sulfide, methyl mercaptan, trimethylamine, etc.), and may adsorb the plurality of substances independently. An adsorbent may be added (basically, any adsorbent adsorbs any substance although there is a difference in ease of adsorption depending on the substance).
[0020]
Therefore, in the decorative board A according to this embodiment, since the mineral fiber board 1 as a base material contains a hydrophilic moisture absorbing / releasing material, the moisture absorbing / releasing material is used under a high humidity condition. Moisture is selectively adsorbed through the breathable coating 2.
[0021]
On the other hand, since the adsorbents of formaldehyde, VOC and malodor are hydrophobic, the amount of moisture adsorbed by the adsorbent is small, and the function of each of these adsorbents is sufficiently exhibited.
[0022]
The coating film 2 contains not only the formaldehyde, VOC and odor adsorbents, but also a photocatalyst that decomposes substances adsorbed by the adsorbents. Thus, the adsorbent can be decomposed at any time, and the adsorbing function can be maintained for a long period of time regardless of the adsorbing capacity of the adsorbent.
[0023]
【Example】
Next, a specific embodiment will be described.
[0024]
(Example 1)
The base material made of mineral fiberboard is made of rock wool as a main component, perlite and bentonite as inorganic fillers, starch and waste paper pulp as a binder, and B-type silica gel as a moisture absorbing and releasing material. did. These materials were uniformly dispersed and kneaded in water to form a slurry, which was formed by wet papermaking, which is a usual method for producing a mineral fiber board, dewatered under reduced pressure, press-molded, and further dried to obtain a base material. .
[0025]
Next, the surface of the base material was coated with an undercoat and an overcoat. The undercoat paint contains 30% by weight of calcium carbonate as an extender pigment, 15% by weight of titanium oxide as a white pigment, 9% by weight of silica as a matting pigment, 16% by weight of a vinyl acetate resin as a binder, and a dispersant as an auxiliary agent. 1% by weight of a fungicide, a defoamer and a thickener, and 2.5% by weight of acetylacetaminoamine (R-CONHNH 2 ), an amine as a formaldehyde adsorbent, and the remaining water was added and stirred. It was done.
[0026]
On the other hand, the top coat paint contains 30% by weight of an acrylic resin as a binder, 3% by weight of titanium oxide as a pigment, and as other auxiliary agents, a dispersant, a fungicide, a defoamer, a thickener, a matting agent, and an antiblocking agent. 1 wt% in total, 2 wt% of activated carbon as a VOC adsorbent, 2 wt% of an inorganic oxide-based chemical adsorbent (zeolite containing zinc) as a deodorant, and 3 wt% of a titanium oxide-based catalyst as a photocatalyst. And emulsified by adding the remaining water.
[0027]
Then, after applying the undercoat paint on the surface of the base material at a rate of 150 to 250 g / m 2 and drying, apply a top coat paint thereon at a rate of 50 to 150 g / m 2 and then drying. A test piece (sample) was used.
[0028]
(Comparative Example 1)
Comparative Example 1 uses a paint that does not contain a formaldehyde adsorbent, a VOC adsorbent, a deodorant, and a photocatalyst in the above example, and the other configuration is the same as the example.
[0029]
(Comparative Example 2)
Comparative Example 2 used a normal mineral fiber board containing no B-type silica gel as a base material, and applied a coating containing a formaldehyde adsorbent, a VOC adsorbent, a deodorant, and a photocatalyst in the same manner as in Example. It was used.
[0030]
The compositions of the above Examples, Comparative Examples 1 and 2 are shown in Table 1 below.
[0031]
[Table 1]
Figure 2004291468
[0032]
The above Example, Comparative Example 1 and Comparative Example 2 were tested for (1) moisture absorption / desorption performance, (2) VOC adsorption performance, (3) formaldehyde adsorption performance, and (4) ammonia adsorption performance (deodorizing performance). Was evaluated.
[0033]
{Circle around (1)} The mouth and back of the test piece were masked with aluminum tape and cured at 25 ° C. and 50% RH for 24 hours or more. After the curing, the atmosphere was changed to 25 ° C. and 90% RH, and the moisture absorption of the test piece was measured by weight change. After 24 hours, the temperature was returned to 25 ° C. and 50% RH again, and the amount of released moisture was measured. The result is shown in FIG. According to FIG. 3, the Example and Comparative Example 1 have a moisture absorption / desorption amount four times or more that of Comparative Example 2, and it is understood that they are excellent in moisture absorption / desorption properties.
[0034]
FIG. 4 shows actual humidity control performance according to changes in temperature and humidity in the room. According to FIG. 4, with changes in temperature and humidity, Comparative Example 2 having a low moisture absorption / release property may shift to a mold generation danger zone or a drying zone, but Example and Comparative Example 1 are maintained in a comfortable zone. You.
[0035]
{Circle over (2)} The test piece having a VOC adsorption performance of 20 cm square was masked on the back and back of the test piece with aluminum tape and placed in a 100 L stainless steel chamber. Toluene gas is injected while flowing clean air into this chamber to make the initial concentration 1000 μg / m 3 . The air in the chamber was sampled every time elapsed from the gas injection, and analyzed by a heat desorption GC-MS method to measure the toluene concentration. Such a measurement was carried out while changing the atmosphere between a normal state (55% RH), low humidity (20% RH) and high humidity (85% RH). The result is shown in FIG. 5A shows a normal state, FIG. 5B shows a low humidity state, and FIG. 5C shows a high humidity state.
[0036]
According to the results, in the example, the adsorption of the coating film by the adsorbent and the adsorption of the substrate by B-type silica gel were performed. In Comparative Example 1, the adsorption of the substrate by B-type silica gel was performed, and in Comparative Example 2, the adsorption was performed by B-type silica gel. The coating film is adsorbed by the adsorbent.
[0037]
In the normal state and at the time of low humidity, the example is the best, but there is no big difference compared with the comparative examples 1 and 2. On the other hand, at the time of high humidity, in the example, moisture is adsorbed by the B-type silica gel of the base material, and therefore, VOC is adsorbed by the adsorbent of the coating film. Not obtained. Further, it can be seen that Comparative Example 2 did not provide a sufficient amount of adsorption to VOC because the adsorbent adsorbs moisture itself.
[0038]
{Circle around (3)} The test piece having a formaldehyde adsorption performance of 10 cm square was masked with an aluminum tape on the mouth and the back of the test piece, and was placed in a 40 L acrylic desiccator. A formaldehyde gas was injected into the desiccator so as to be 0.50 ppm. The air in the desiccator was sampled every time elapsed from the gas injection, and the formaldehyde concentration was measured by the AHMT colorimetric method. Such a measurement is performed in a normal state (55% RH), and the measurement result is shown in FIG.
[0039]
According to FIG. 6, the adsorption performance of formaldehyde is larger in Comparative Example 2 than in Comparative Example 1, and the Example is larger than Comparative Example 2 (Example> Comparative Example 2> Comparative Example 1). In the examples, in addition to the adsorption of the coating film by the adsorbent, the effect of adsorption of the base material by silica gel is observed.
[0040]
(4) Ammonia adsorption performance (deodorant performance)
A 10 cm square test specimen was masked at the mouth and the back with an aluminum tape and placed in a 40 L acrylic desiccator, and ammonia gas was injected into the desiccator so as to have a concentration of 15 ppm. The air in the desiccator was sampled with a detector tube at the time elapsed from the gas injection and the ammonia concentration was measured. This measurement was performed in a normal state (55% RH), and the result is shown in FIG.
[0041]
The ammonia adsorption performance was in the order of Example> Comparative Example 2> Comparative Example 1 similarly to the formaldehyde adsorption performance. Also in this case, in the example, the effect of the adsorption of the coating film by the adsorbent and the adsorption of the base material by the silica gel can be seen.
[0042]
From the above results, it can be seen that the decorative board of the present invention can stably adsorb formaldehyde, VOC and odor over a long period of time.
[0043]
【The invention's effect】
As described above, according to the decorative board of the first aspect of the present invention, the vehicle and the pigment are provided on the surface of the mineral fiber board made of the mineral fiber, the inorganic filler, the binder, and the hydrophilic moisture absorbing and releasing material. And a hydrophobic adsorbent for adsorbing at least one of formaldehyde, VOC and malodor, and a photocatalyst for decomposing the adsorbed substance of the adsorbent, thereby forming a breathable coating film. The hydrophilic moisture absorbing / releasing material contained in the mineral fiberboard as a material allows moisture under high humidity conditions to be selectively adsorbed through a breathable coating film, and formaldehyde, VOC and odor adsorbents It is hydrophobic and has a small amount of moisture adsorbed, so that the adsorbing function can be fully exhibited. Not for a long time It can last stable adsorption function.
[0044]
According to the second aspect of the present invention, since the moisture absorbing and releasing material is a B-type silica gel which absorbs and releases moisture in a normal state, a preferable moisture absorbing and releasing material can be easily obtained.
[Brief description of the drawings]
FIG. 1 is a sectional view of a decorative board according to an embodiment of the present invention.
FIG. 2 is a characteristic diagram showing the moisture absorption performance of B-type silica gel in comparison with A-type silica gel.
FIG. 3 is a graph showing moisture absorption / release performance by a moisture absorption / desorption test.
FIG. 4 is a diagram showing indoor humidity control performance by a moisture absorption / release test.
FIG. 5 is a graph showing toluene adsorption performance.
FIG. 6 is a graph showing formaldehyde adsorption performance in a normal state.
FIG. 7 is a view showing ammonia adsorption performance in a normal state.
[Explanation of symbols]
A decorative board 1 mineral fiber board 2 coating film

Claims (2)

鉱物質繊維、無機充填材、結合剤、及び親水性の吸放湿材からなる基材としての鉱物質繊維板の表面に、
ビヒクルと、顔料と、ホルムアルデヒド、VOC及び悪臭の少なくとも1つを吸着する疎水性の吸着剤と、該吸着剤で吸着された物質を分解する光触媒とからなりかつ通気性を有する塗料が塗布された塗膜が形成されていることを特徴とする化粧板。
Mineral fiber, inorganic filler, binder, and the surface of the mineral fiber board as a substrate consisting of hydrophilic moisture absorbing and releasing material,
A paint having air permeability, which is composed of a vehicle, a pigment, a hydrophobic adsorbent for adsorbing at least one of formaldehyde, VOC and malodor, and a photocatalyst for decomposing a substance adsorbed by the adsorbent, is applied. A decorative plate characterized by having a coating film formed thereon.
請求項1の化粧板において、
吸放湿材がB型シリカゲルであることを特徴とする化粧板。
The decorative board according to claim 1,
A decorative plate, wherein the moisture absorbing and releasing material is B-type silica gel.
JP2003088344A 2003-03-27 2003-03-27 Decorative sheet Pending JP2004291468A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006316440A (en) * 2005-05-11 2006-11-24 Fujita Corp Sheet for construction work and method for suppressing release of voc at construction site
JP2013063635A (en) * 2011-08-26 2013-04-11 Dainippon Printing Co Ltd Decorative sheet
JP2013082199A (en) * 2011-09-30 2013-05-09 Dainippon Printing Co Ltd Laminate sheet and foam laminated sheet
JP2013208719A (en) * 2012-03-30 2013-10-10 Dainippon Printing Co Ltd Decorative sheet and decorative board

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006316440A (en) * 2005-05-11 2006-11-24 Fujita Corp Sheet for construction work and method for suppressing release of voc at construction site
JP4692989B2 (en) * 2005-05-11 2011-06-01 株式会社フジタ Method of suppressing divergence of VOC at construction site
JP2013063635A (en) * 2011-08-26 2013-04-11 Dainippon Printing Co Ltd Decorative sheet
JP2013082199A (en) * 2011-09-30 2013-05-09 Dainippon Printing Co Ltd Laminate sheet and foam laminated sheet
JP2013208719A (en) * 2012-03-30 2013-10-10 Dainippon Printing Co Ltd Decorative sheet and decorative board

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